<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue.js"></script>
</head>

<body>
    <div id="demo">
        <h1>{{str}}</h1>
        <p v-text='str2'></p>
        <p v-html='str2'></p>
    </div>
</body>
asd
<script>
    new Vue({
        el: '#demo',
        data: {
            str: 'Hello, World!',
            str2: ' <h1>Hello, World123</h1>',
        }
    })


</script>

</html>